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Return to Abstracts of Patents Return to Abstracts of Patents 1250-1499 Patent Abstracts1260. ------. [I. G. FARBENINDUSTRIE A. G.] Hydrocarbons. British Patent 449,274, June 24, 1936. Chem. Abs., vol. 30, 1936, p. 7835. See French Patent 799, 058 (abs. 1272). |